eaynal



(No Mdel.)

A. H. RAYNAL.

MOLD POR CASTING TUBE HEADS.

No. 361,373. Patented Apr. 19, 1887.

UNITED STATES PATENT OFFICE.

ALFRED H. RAYNAL, OF IIOBOKEN, NEW JERSEY, ASSIGNOR TO CORNELIUS II. DELAMATER, GEORGE I-I. ROBINSON, AND WILLIAM DELAMATER, ALL

or NEW YORK, N. Y.

MOLD FOR CASTING TUBE-HEADS.

SPECIFICATION forming part of Letters Patent No. 361,373, dated Apr119, 1887.

Application tiled February 1, 1887. Serial No. 226,113. (No model.)

To ctZZ whoml it rit/ty con/cern:

Be it known that I, ALFRED H. RAYNAL, of

Hoboken, in the county of Hudson and State of New Jersey, have invented a new and useiul Improvement in Molds for Casting Tube Heads or Plates, of which the following is a specification.

My invention may be employed in making plates which have holes or perforations at short intervals in their surfaces, and is particularly useful in making the tube heads or plates of s'tnfaceeondensers.

According to the ordinary method of making cored tube heads or plates it has been usual to form each core separately and to provide on the pattern core-prints, the separate cores being each set in a separate impression formed in the mold.

The object of my invention is to reduce the 'o expense of forming such tube heads or plates, and also to provide for more accurately sus taining the cores, so that the axes of the several holes or perforations will be truly transverse to the surfaces of the head or plate; and

according to my invention I accomplish these results by reducing the expense of forming the cores by reducing the labor upon the pat-tern and by reducing the labor of placing the cores Within the mold.

The invention consists in a mold for casting cored tube heads or plates, composed of a lower portion wherein are arranged side by side a series of core-bars, each having formed integral with it a line or row of core projections which extend to the top of said lower portion, and a closed top or cope to which the core 'projections extend.

In the accompanying drawings I have represented the several steps which are comprised 4o in carrying out my improvement.

Figures 1 and 2 are respectively` a side view and an end view of a corebar having upright and parallel core projections which I employ. Fig. 3 is a plan of such bar, also showing in dotted outline a similar bar arranged in suitable position at the side thereof.

Fig. 4 is an edge view of the pattern with its attached coreprint. Fig. 5 is a. sectional elevation of the mold which has been formed from the pattern, showing the several core- 5o bars as arranged in place therein; and Fig. 6 is a transverse section of a plate cast in such mold.

Similar letters of reference designate corre sponding parts in all the figures.

The finished plate A has in it numerous holes or openings, b, and is intended to serve as a tube head or plate for a surface-condenser or analogous structure, each of said holes beAv ing adapted to receive a tube, and, inasmuch oo as a gland may be employed to compress packing about each tube,I have represented the holes or perforations b as reduced in diameter near one surface of the plate, as shown at b', in order to form the bottom of the packingbox.

To produce holes b b of the form shown in Fig. 6,' it is necessary that the several core projections C' (shown in Figs. l, 2, and 3) should have portions or projections of reduced diam- 7o eter c at the ends. The cores C' are not sepa` rate from each other, as is usual, but they all spring upward from a core-bar, C, and are formed in a core-box integral withfsaid bar. Any desired number of the bars C, with their 7 5 integral projections C,are made to answer the requirements of the case. The bars may all be made of the -same length, and when arranged side by side the core projections O of adjacent bars should alternate relative to each 8o other in many cases, as is shown in Fig. 3, where I have represented a dotted outline of a second core'bar arranged at the side of the one which is shown in full outline.

It will be observed that a core-bar C, with any number of core-projections C', may be made 'with far less labor than is necessary to produce an equalnumber of cylindric cores vO' Separate from and independent of each other;

and, this method is also desirable because the 9o cores or core projections C', being formed integral with the bar- C, are always maintained in accurate parallel positions. The pattern B, (shown in Fig. 4,) instead of having uponits face a number of separate core-prints equal to the number of holes to be formed in the plate A, has a single core-print, B',the thickness of which is substantially equal to the depth of the core-bars C, and the dimensions of which are substantial] y equal to the aggregate dimensions of the necessary number oi' corebars when placed side by side, as shown in Fig. In Fig. -5 DDdesignate the upperandlower sections of a two-part iiask to contain sand for forming a mold ofthe plate A. After the mold has been formed the corefbars C are placed side by side, as shown in Fig. 5, in the impression left by the core-print B of thepattern, and they iill the space left by such impression, exeept, possibly, a little sand may be introduced at the end of each core-bar to iill the spaces formed by the alternate arrangement of the bars one relatively to another, as shown by Fig. When the core-bars C are thus placed in position in the lower section of the mold, the tops of the projections C are just flush With the surface of that section, and when the cope which is in the upper liaslcseetion7 D', is placed in position it makes contact with the top ofthe core projections C,and the metal may then be poured to fill the mold.

top portion or cope to which the NVbat I claim as myinvention, and desire to t secure by Letters Patent, is`

rlhe mold for casting cored tube beads and plates, consisting of a lower portion wherein are arranged side by side aseries ofeore-bars,(), each having formed integral with it a line or row of core projections, C, which extend to the top ol said lower portion, and the closed core projections G extend, substantially as herein described.

ALFRED n. RAYNAL.

Witnesses:

FREDK. HAYNics, EMIL H ERTER.

It is herein7 certiud that in Letters Patent No. 361,373, granted April 19, 1887, upon the application of Alfred H. Raynal, of Hoboken, New Jersey, for an improvement in Molds for Casting Tube-Heads, un error appears in the printed specification requiring correction, as follows: On page 2, line 27, the word internal should rend integral and that the Letters Patent should be read with this correction therein that the same may conform to the record of the onse in the Patent Oce.

Signed, countersigned, and sealed this 3d day of' May, A. D. 1887.

D. L. HAWKINS,

[SEAL] Acting Secretary of the Interim'.

Countersigned:

BENTON J. HALL,

Commissioner of Patents. 

